Is the Letta MCP server free?

Yes. Activepieces is open source and free to start, and the MCP server is included on every plan, from the free cloud tier to any self-hosted deployment.

How do I connect Letta to Claude or Cursor?

Connect Letta in Activepieces, enable the server under Settings → MCP Server, then paste your server URL into your client config. It authenticates over OAuth on first use.

What can my agent do in Letta?

It can call 4 tools, including Create Agent From Template, Create Identity, Send Message to Agent, and chain them with steps in other apps inside the same run.

Is it safe to let an agent call Letta?

Connections use OAuth2 with limited scopes and are stored under 256-bit encryption, with no API to read them back, so an agent gets scoped access rather than your keys.

Letta MCP server

Letta is the platform for building stateful agents: open AI with advanced memory that can learn and self-improve over time.

Letta is not a separate install. One Activepieces MCP server exposes it alongside 770+ other apps, behind a single URL.

Start building See the Letta integration

Tools: 4
Works with: Any MCP client
Auth: Custom auth
License: MIT, open source
Updated: November 2026

About the Letta MCP server

Connect Letta once in Activepieces and every action it ships becomes a tool your assistant can call, behind the same server URL as the rest of your apps. Your agent reaches Letta and 770+ other apps over a single connection, on our cloud or a self-hosted install.

Tools

Letta tools your AI can run

Once connected, your assistant can call any of these Letta actions by asking in plain language.

Create Agent From Template
Creates an agent from a template version (Letta Cloud only; uses Letta's deprecated templates endpoint)
7 fields
Create Identity
Creates a Letta identity. Letta Cloud no longer supports Identities; this only works on self-hosted Letta servers that still serve them.
5 fields
Send Message to Agent
Send message to an agent
3 fields
Get Identities
Searches for identities in your Letta Project. Letta Cloud no longer supports Identities; this only works on self-hosted Letta servers that still serve them.
5 fields

Triggers

Letta events your agent can watch

These start a run the moment something happens in Letta, so work gets picked up on its own.

New Agent
Triggers when a new agent is created
New Message
Triggers when an agent replies (assistant message, or send_message on legacy agents)
1 field

Give your assistant Letta

Connect Letta once and every tool above is callable from Claude, Cursor or any MCP client, behind the same server URL as 770+ other apps. Free to start.

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